From 3709744c60696c5e3f4cc123939921ce8107fe04 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Wed, 17 Apr 2019 18:48:08 -0700
Subject: Adding switch &dch -e to reduce equivalences.

---
 src/base/abci/abc.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index 08c9ca49..77d11cd1 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -39140,11 +39140,11 @@ int Abc_CommandAbc9Dch( Abc_Frame_t * pAbc, int argc, char ** argv )
 {
     Gia_Man_t * pTemp;
     Dch_Pars_t Pars, * pPars = &Pars;
-    int c;
+    int c, fEquiv = 0;
     // set defaults
     Dch_ManSetDefaultParams( pPars );
     Extra_UtilGetoptReset();
-    while ( ( c = Extra_UtilGetopt( argc, argv, "WCSsptfrvh" ) ) != EOF )
+    while ( ( c = Extra_UtilGetopt( argc, argv, "WCSsptfrevh" ) ) != EOF )
     {
         switch ( c )
         {
@@ -39196,6 +39196,9 @@ int Abc_CommandAbc9Dch( Abc_Frame_t * pAbc, int argc, char ** argv )
         case 'r':
             pPars->fSkipRedSupp ^= 1;
             break;
+        case 'e':
+            fEquiv ^= 1;
+            break;
         case 'v':
             pPars->fVerbose ^= 1;
             break;
@@ -39215,12 +39218,22 @@ int Abc_CommandAbc9Dch( Abc_Frame_t * pAbc, int argc, char ** argv )
         Abc_Print( -1, "Abc_CommandAbc9Dch(): This command does not work with barrier buffers.\n" );
         return 1;
     }
-    pTemp = Gia_ManPerformDch( pAbc->pGia, pPars );
+    if ( fEquiv )
+    {
+        Aig_Man_t * pNew = Gia_ManToAigSimple( pAbc->pGia );
+        assert( Gia_ManObjNum(pAbc->pGia) == Aig_ManObjNum(pNew) );
+        Dch_ComputeEquivalences( pNew, (Dch_Pars_t *)pPars );
+        Gia_ManReprFromAigRepr( pNew, pAbc->pGia );
+        Aig_ManStop( pNew );
+        pTemp = Gia_ManEquivReduce( pAbc->pGia, 1, 0, 0, 0 );
+    }
+    else
+        pTemp = Gia_ManPerformDch( pAbc->pGia, pPars );
     Abc_FrameUpdateGia( pAbc, pTemp );
     return 0;
 
 usage:
-    Abc_Print( -2, "usage: &dch [-WCS num] [-sptfrvh]\n" );
+    Abc_Print( -2, "usage: &dch [-WCS num] [-sptfrevh]\n" );
     Abc_Print( -2, "\t         computes structural choices using a new approach\n" );
     Abc_Print( -2, "\t-W num : the max number of simulation words [default = %d]\n", pPars->nWords );
     Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
@@ -39230,6 +39243,7 @@ usage:
     Abc_Print( -2, "\t-t     : toggle simulation of the TFO classes [default = %s]\n", pPars->fSimulateTfo? "yes": "no" );
     Abc_Print( -2, "\t-f     : toggle using lighter logic synthesis [default = %s]\n", pPars->fLightSynth? "yes": "no" );
     Abc_Print( -2, "\t-r     : toggle skipping choices with redundant support [default = %s]\n", pPars->fSkipRedSupp? "yes": "no" );
+    Abc_Print( -2, "\t-e     : toggle computing and merging equivalences [default = %s]\n", fEquiv? "yes": "no" );
     Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", pPars->fVerbose? "yes": "no" );
     Abc_Print( -2, "\t-h     : print the command usage\n");
     return 1;
-- 
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